Package io.datarouter.filesystem.snapshot.reader

Class ScanningSnapshotReader

java.lang.Object

io.datarouter.filesystem.snapshot.reader.ScanningSnapshotReader

public class ScanningSnapshotReader
extends Object

Thread-safe The parallel operations perform the potentially high-latency block fetches The blocks are passed to the parent scanner which parses them. The parsing could potentially be done in the parallel section, but it would result in more objects being allocated at the same time. The parsing of the blocks is pretty inexpensive, so this version leaves that for the parent reader thread.

Constructor Summary

Constructors

Constructor	Description
ScanningSnapshotReader(SnapshotKey snapshotKey, ExecutorService exec, int numThreads, BlockLoader blockLoader, int numBlocks)

Method Summary

Modifier and Type	Method	Description
io.datarouter.scanner.Scanner<SnapshotRecord>	scan(int fromRecordIdInclusive)
io.datarouter.scanner.Scanner<byte[]>	scanColumnValues(int column)
io.datarouter.scanner.Scanner<byte[]>	scanKeys()
io.datarouter.scanner.Scanner<SnapshotLeafRecord>	scanLeafRecords(byte[] startKey, boolean inclusive)
io.datarouter.scanner.Scanner<SnapshotLeafRecord>	scanLeafRecords(long fromRecordIdInclusive)
io.datarouter.scanner.Scanner<byte[]>	scanValues()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ScanningSnapshotReader

public ScanningSnapshotReader(SnapshotKey snapshotKey,
ExecutorService exec,
int numThreads,
BlockLoader blockLoader,
int numBlocks)

Method Details

scanLeafRecords

public io.datarouter.scanner.Scanner<SnapshotLeafRecord> scanLeafRecords(long fromRecordIdInclusive)

scanLeafRecords

public io.datarouter.scanner.Scanner<SnapshotLeafRecord> scanLeafRecords(byte[] startKey,
boolean inclusive)

scanKeys

public io.datarouter.scanner.Scanner<byte[]> scanKeys()

scanValues

public io.datarouter.scanner.Scanner<byte[]> scanValues()

scanColumnValues

public io.datarouter.scanner.Scanner<byte[]> scanColumnValues(int column)

scan

public io.datarouter.scanner.Scanner<SnapshotRecord> scan(int fromRecordIdInclusive)